Photo: Mike Thut -- There are some encouraging developments with regard to longtime Jefferson Starship guitarist Slick Aguilar's quest to receive a liver transplant. The 58-year-old rocker, who found out late last year that he needed the life-saving operation, posted a message on his official Facebook page last week revealing that he got some good news from his doctors.

"I was told that I am now first in line for a transplant for my blood type whenever the next liver becomes available," Aguilar reports.

However, Slick also reveals that there's a negative side to his situation. "My blood type is B-[minus], which is kind of rare," he explains. "So, even though I am now at the top of the list, it could still take a while before a B-[minus] liver becomes available. Could be tomorrow -- could be 6 months."

Aguilar, whose condition forced him to stop touring with Jefferson Starship, admits that he has mixed feeling about the impending surgery.

"I am excited and nervous at the same time," he notes. "When I received this news, my heart raced as this is what I have been hoping and praying for. But when I think that I may be under the knife soon, it's scary."

He adds that he realizes the procedure "has to be done sooner or later, [so] let's rock & roll and get this done!"

In February, a star-studded benefit concert to help Slick with expenses he's incurred because of his condition was held in San Francisco. The show included performances from David Crosby, founding Jefferson Airplane singer Marty Balin, Country Joe McDonald, Big Brother and the Holding Company and current Jefferson Starship members. Fans who'd still like to donate to the cause can do so by visiting SlickAguilar.com.